31340399 has 8 divisors (see below), whose sum is σ = 32114880. Its totient is φ = 30570496.

The previous prime is 31340381. The next prime is 31340417. The reversal of 31340399 is 99304313.

It is an interprime number because it is at equal distance from previous prime (31340381) and next prime (31340417).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31340399 - 2⁸ = 31340143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15647 + ... + 17535.

It is an arithmetic number, because the mean of its divisors is an integer number (4014360).

Almost surely, 2^31340399 is an apocalyptic number.

31340399 is a deficient number, since it is larger than the sum of its proper divisors (774481).

31340399 is a wasteful number, since it uses less digits than its factorization.

31340399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 31340399 is about 5598.2496371634. The cubic root of 31340399 is about 315.2836916861.

The spelling of 31340399 in words is "thirty-one million, three hundred forty thousand, three hundred ninety-nine".